I had a JD bender. Unless you plan to do a lot of stuff its not a good investment. Its one thing to say a certain size die will do you but they make about a dozen different radiuses in each size !! As a manually operated unit it needs a large footprint. You're a handy guy Andy, there are a lot of good plans on the net to build a hydraulic bender using commercially available dies. They have a smaller footprint. With the JD the hydraulics are an option and not a cheap one. I didn't get enough use out of it so I sold it.
I also looked at these, and decided I couldn't justify the cost or space. I bought one of the compact ones from Speedway Motors (PN91084112). It is more limited in function, but I used it to put some bends in my roll bar. Eastwood (12485) and a few other vendors have a similar model.
On the JD Benders, SWAG Offroad has a pretty neat looking mount that is not too expensive and allows the use of a Harbor Freight ram that is also pretty cheap....
